Mastering Windows PowerShell Scripting - Third Edition

The PSTypeName attribute

It is not uncommon in PowerShell to want to pass an object created in one command, as a PSObject (or PSCustomObject), to another. The PSTypeName attribute is able to test the type name assigned to a custom object. Type names are assigned by setting (or adding) a value to the hidden PSTypeName property. There are a number of ways to tag PSCustomObject with a type name. The simplest is to set a value for a PSTypeName property, shown as follows:

$object = [PSCustomObject]@{    Property   = 'Value'    PSTypeName = 'SomeTypeName'}

The PSTypeName property remains hidden, but Get-Member will now show the new type name:

PS> $object | Get-MemberTypeName: SomeTypeNameName           MemberType      Definition----           ----------      ----------Equals Method ...